// This file is part of OpenTSDB.
// Copyright (C) 2010-2012  The OpenTSDB Authors.
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 2.1 of the License, or (at your
// option) any later version.  This program is distributed in the hope that it
// will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
// General Public License for more details.  You should have received a copy
// of the GNU Lesser General Public License along with this program.  If not,
// see <http://www.gnu.org/licenses/>.
package net.opentsdb.core;

import com.stumbleupon.async.Callback;

import java.util.ArrayList;

class GroupCallback implements Callback<Object, ArrayList<Object>> {
    /**
     * We're only waiting for all callbacks to complete, ignoring their return values.
     *
     * @param ignored The return values of the individual callbacks - ignored
     * @return null
     */
    @Override
    public Object call(ArrayList<Object> ignored) {
        return null;
    }
}
